Device for cross/cutting material strips, in particular cardboard strips

• US 6,883,409 B1
• Filed: 09/01/2000
• Issued: 04/26/2005
• Est. Priority Date: 09/21/1999
• Status: Expired due to Fees

• Current Assignee: Jagenberg Querschneider GmbH (Leuze Geschäftsführungs-GmbH)
• Original Assignee: Jagenberg Querschneider GmbH (Leuze Geschäftsführungs-GmbH)
• Inventors: Lange, Wolfgang, Spix, Guido, Stitz, Albert, Schmid, Frank
• Primary Examiner(s): Eley, Timothy V.
• Assistant Examiner(s): NGUYEN, PHONG H
• Application Number:
  US10/110,485
• Time in Patent Office: 1,698 Days
• Field of Search: 834/361, 83/90, 831/06, 83/921, 831/551, 831/67, 831/05, 83/86, 831/10, 831/11, 831/55, 83/29, 831/00, 271/202, 271/204, 271/270, 414/788.1, 414/789.8, 414/791.5, 414/793.3, 198/418.6, 198/418.7, 198/419.2, 198/792, 198/804
• US Class Current: 83/155.1
• CPC Class Codes: B65H 2701/1762 Corrugated
• CPC Class Codes: B65H 29/12 by means of the nip between two, or between two sets of, moving tapes or bands or rollers
• CPC Class Codes: B65H 29/62 diverting faulty articles from the main streams control devices detecting faulty articles B65H43/04
• CPC Class Codes: B65H 29/6627 in combination with auxiliary means for overlapping articles
• CPC Class Codes: B65H 35/08 from or with revolving, e.g. cylinder, cutters or perforators
• CPC Class Codes: Y10T 83/0476 Including stacking of plural workpieces
• CPC Class Codes: Y10T 83/2046 Including means to move stack bodily
• CPC Class Codes: Y10T 83/207 By suction means
• CPC Class Codes: Y10T 83/2094 Means to move product at speed different from work speed
• CPC Class Codes: Y10T 83/2194 And means to remove product therefrom

Abstract

A device for cross cutting a cardboard web in which, both the blade drums, a sheet transport conveyor accelerates the sheets and then the sheets are positioned to shingle the sheets on a further conveyor. The sheet transport conveyor has a rerouting roller at the outlet side of its upper pass and then extends downwardly into a sheet discharge gate through which defective sheets are effected.

Claims

1. An apparatus for cross-cutting a cardboard web, comprising:

a web feeder for feeding a cardboard web to the apparatus;

a cross-cutter device positioned to receive said web from said feeder and provided with two blade drums having transverse blades for shearing said web across a width thereof into a succession of sheets; and

a sheet transport device downstream of said cross-cutter device in a direction of displacement of said web and said sheets and including;

a lower belt conveyor having an upper pass extending between an upstream rerouting roller positioned to receive said sheets from said cross-cutter device and a downstream rerouting roller bounding a discharge gate, and a downwardly inclined pass beginning at said downstream rerouting roller and forming a conveyor of sheets in said discharge gate, said upper pass accelerating said sheets away from said cross-cutter device, and

a brake downstream of said upper pass for slowing said sheets so that subsequent sheets overlap previous sheets to form a shingled series of said sheets, said brake being spaced from said downstream rerouting roller whereby said downstream rerouting roller and said upper pass free said sheets for travel over a path region in which said sheets are not engaged;

a deflector for selectively deflecting a sheet to be discharged into said discharge gate;

a further conveyor for displacing said shingled series of sheets in said direction of displacement; and

a carriage shiftable in said direction of displacement, said lower belt conveyor, said brake and said deflector being mounted on said carriage, and a piston-and-cylinder unit connected with said carriage for displacing said carriage between an operating position close to said cross-cutter device and another position spaced away from said cross-cutter device.

2. The apparatus defined in claim 1, wherein said downstream rerouting roller is spaced from rotation axes of said blade drums by a distance less than a maximum sheet length in said direction of displacement.

3. The apparatus defined in claim 1 wherein said distance is less than a minimum sheet length in said direction of displacement.

4. The apparatus defined in claim 1, further comprising a capturing roller above said upper pass and forming a clamping nip with said upper pass of said lower belt conveyor.

5. The apparatus defined in claim 4 wherein said capturing roller is an inlet side rerouting roller of an upper belt conveyor extending above said upper pass over a length in said direction of displacement at least equal to a maximum sheet length.

6. The apparatus defined in claim 5 wherein said further conveyor is a belt conveyor slower than the lower belt conveyor having said upper pass and extending in said direction of displacement to a stacking device, said apparatus further comprising a capturing roller above said further conveyor forming a clamping gap with said further conveyor and defining an end of a path of the sheets in which the sheets are not gripped.

7. The apparatus defined in claim 6 wherein said brake is a suction box having an upper wall parallel to a conveyor plane in which said sheets travel and formed with suction openings.

8. The apparatus defined in claim 1, further comprising two driven traction rollers at an outlet of said gate discharge and formed as cutting rollers.

9. The apparatus defined in claim 1, further comprising means pivotally mounted to open said gate toward said blade drums at an inlet to said discharge gate.